package StudyCode.Reflect;

import com.sun.scenario.effect.impl.sw.sse.SSEBlend_SRC_OUTPeer;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.Scanner;

/**
 * @author lixiaoyao
 */
public class ReflectionTest {

	public static void main(String[] args) {
		String name;
		if (args.length > 0) {
			name = args[0];
		} else {
			Scanner in = new Scanner(System.in);
			System.out.println("Enter class name(e.g. java.util.Date): ");
			name = in.next();
		}

		try {
			Class cl = Class.forName(name);
			Class superCl = cl.getSuperclass();
			String modifiers = Modifier.toString(cl.getModifiers());
			if (modifiers.length() > 0) {
				System.out.print(modifiers + " ");
			}
			System.out.print("class " + name);
			if (superCl != null && superCl != Object.class) {
				System.out.print(" extends " + superCl.getName());
			}
			System.out.print(" {\n");
			printConstructors(cl);
			System.out.println();
			printMethods(cl);
			System.out.println();
			printFields(cl);
			System.out.println("}");
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		}
		System.exit(0);
	}

	public static void printConstructors(Class cl) {
		Constructor[] constructors = cl.getDeclaredConstructors();
		for (Constructor c : constructors) {
			String name = c.getName();
			System.out.print("  ");
			String modifiers = Modifier.toString(c.getModifiers());
			if (modifiers.length() > 0) {
				System.out.print(modifiers + " ");
			}
			System.out.print(name + "(");

			// print parameter types
			Class[] paramTypes = c.getParameterTypes();
			for (int j = 0; j < paramTypes.length; j++) {
				if (j > 0) {
					System.out.print(", ");
				}
				System.out.print(paramTypes[j].getName());
			}
			System.out.println(");");
		}
	}

	public static void printMethods(Class cl) {
		Method[] methods = cl.getDeclaredMethods();
		for (Method method : methods) {
			Class retType = method.getReturnType();
			String name = method.getName();

			System.out.print("  ");
			// print modifiers,return type and method name
			String modifiers = Modifier.toString(method.getModifiers());
			if (modifiers.length() > 0) {
				System.out.print(modifiers + " ");
			}
			System.out.print(retType.getName() + " " + name + "(");
			// print parameter types
			Class[] parameterTypes = method.getParameterTypes();
			for (int j = 0; j < parameterTypes.length; j++) {
				if (j > 0) {
					System.out.print(", ");
				}
				System.out.print(parameterTypes[j].getName());
			}
			System.out.println(");");
		}
	}

	public static void printFields(Class cl) {
		Field[] fields = cl.getDeclaredFields();
		for (Field field : fields) {
			Class type = field.getType();
			String name = field.getName();
			System.out.print("  ");
			String modifiers = Modifier.toString(field.getModifiers());
			if (modifiers.length() > 0) {
				System.out.print(modifiers + " ");
			}
			System.out.println(type.getName() + " " + name + ";");
		}
	}

}
